There was an early radio programme this morning on these night feeding birds, apparently there are 150 pairs on the Wessex Downs, and according to the presenter they have been around as long as Stonehenge. According to this old article, that other road, which has not been built of course would have seriously disrupted their presence in the area.
http://www.wildlifeextra.com/go/news/wessex-curlews.html#cr
There is something poetic about stone curlews flying to this particular area, though the 'stone' in their name must surely mean something else, perhaps ground nesting birds........